drivers: hv: kvp: Cleanup the kernel/user protocol
Now, cleanup the user/kernel KVP protocol by using the same structure
definition that is used for host/guest KVP protocol. This simplifies the code.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c
index 4a6971e..0ef4c1f 100644
--- a/drivers/hv/hv_kvp.c
+++ b/drivers/hv/hv_kvp.c
@@ -71,15 +71,20 @@
{
struct cn_msg *msg;
+ struct hv_kvp_msg *kvp_msg;
+ char *version;
- msg = kzalloc(sizeof(*msg) + strlen(HV_DRV_VERSION) + 1 , GFP_ATOMIC);
+ msg = kzalloc(sizeof(*msg) + sizeof(struct hv_kvp_msg), GFP_ATOMIC);
if (msg) {
+ kvp_msg = (struct hv_kvp_msg *)msg->data;
+ version = kvp_msg->body.kvp_version;
msg->id.idx = CN_KVP_IDX;
msg->id.val = CN_KVP_VAL;
- msg->seq = KVP_REGISTER;
- strcpy(msg->data, HV_DRV_VERSION);
- msg->len = strlen(HV_DRV_VERSION) + 1;
+
+ kvp_msg->kvp_hdr.operation = KVP_OP_REGISTER;
+ strcpy(version, HV_DRV_VERSION);
+ msg->len = sizeof(struct hv_kvp_msg);
cn_netlink_send(msg, 0, GFP_ATOMIC);
kfree(msg);
}
@@ -101,23 +106,24 @@
static void
kvp_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
{
- struct hv_ku_msg *message;
+ struct hv_kvp_msg *message;
+ struct hv_kvp_msg_enumerate *data;
- message = (struct hv_ku_msg *)msg->data;
- if (msg->seq == KVP_REGISTER) {
+ message = (struct hv_kvp_msg *)msg->data;
+ if (message->kvp_hdr.operation == KVP_OP_REGISTER) {
pr_info("KVP: user-mode registering done.\n");
kvp_register();
}
- if (msg->seq == KVP_USER_SET) {
+ if (message->kvp_hdr.operation == KVP_OP_ENUMERATE) {
+ data = &message->body.kvp_enum_data;
/*
* Complete the transaction by forwarding the key value
* to the host. But first, cancel the timeout.
*/
if (cancel_delayed_work_sync(&kvp_work))
- kvp_respond_to_host(message->kvp_key,
- message->kvp_value,
- !strlen(message->kvp_key));
+ kvp_respond_to_host(data->data.key, data->data.value,
+ !strlen(data->data.key));
}
}
@@ -125,6 +131,7 @@
kvp_send_key(struct work_struct *dummy)
{
struct cn_msg *msg;
+ struct hv_kvp_msg *message;
int index = kvp_transaction.index;
msg = kzalloc(sizeof(*msg) + sizeof(struct hv_kvp_msg) , GFP_ATOMIC);
@@ -132,9 +139,11 @@
if (msg) {
msg->id.idx = CN_KVP_IDX;
msg->id.val = CN_KVP_VAL;
- msg->seq = KVP_KERNEL_GET;
- ((struct hv_ku_msg *)msg->data)->kvp_index = index;
- msg->len = sizeof(struct hv_ku_msg);
+
+ message = (struct hv_kvp_msg *)msg->data;
+ message->kvp_hdr.operation = KVP_OP_ENUMERATE;
+ message->body.kvp_enum_data.index = index;
+ msg->len = sizeof(struct hv_kvp_msg);
cn_netlink_send(msg, 0, GFP_ATOMIC);
kfree(msg);
}
@@ -191,7 +200,7 @@
kvp_msg = (struct hv_kvp_msg *)
&recv_buffer[sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
- kvp_data = &kvp_msg->kvp_data;
+ kvp_data = &kvp_msg->body.kvp_enum_data;
key_name = key;
/*
@@ -266,7 +275,7 @@
sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
- kvp_data = &kvp_msg->kvp_data;
+ kvp_data = &kvp_msg->body.kvp_enum_data;
/*
* We only support the "get" operation on